[osg-users] how to release loaded model
Hi all.
I need to release loaded model and reload other model. I did as follow:
osgViewer::ViewerViewer;
osg::ref_ptrosg::Group root = new osg::Group;
osg::ref_ptrosg::Group ModelRoot = new osg::Group;
osg::ref_ptrosg::Node loadedModel;
...
Viewer.setSceneData(root.get());
root-addChild(ModelRoot.get());
...
//in frame loop
.
switch(CMD)
{
case LOAD_SCENE:
{
loadedModel = osgDB::readNodeFile(CMD_SceneFileName);
if (loadedModel.valid())
{
ModelRoot-addChild(loadedModel.get());
}
break;
}
case RELEASE_SCENE:
{
if(ModelRoot.valid())
{
ModelRoot-removeChildren(0,ModelRoot-getNumChildren());
}
loadedModel.release();
break;
}
}
...
The loadedModel is added to ModelRoot and is not added to any other group.
Models could be loaded and released. But I found used memory was not
reduced at all after RELEASE_SCENE was executed. After loading and
releasing several times, used memory is more than 1GB and program is
freezed. I want to know the reason and how to improve it.
Much appreciation to any reply.
Regards,
Su Hu
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Re: [osg-users] how to release loaded model
Hi Su,
You shouldn't be called ref_ptr.release() in this context, you should
be just setting the ref_ptr to null.
ref_ptr::release() is a specialist helper method with does an
unref_noDelete on the referenced object - it deliberately doesn't
delete the object that it's unrefecing. This functionality is
required for functions that use ref_ptr locally but then have to
pass a C* point of the object.
Robert.
On Thu, Jul 24, 2008 at 10:45 AM, su hu [EMAIL PROTECTED] wrote:
Hi all.
I need to release loaded model and reload other model. I did as follow:
osgViewer::ViewerViewer;
osg::ref_ptrosg::Group root = new osg::Group;
osg::ref_ptrosg::Group ModelRoot = new osg::Group;
osg::ref_ptrosg::Node loadedModel;
...
Viewer.setSceneData(root.get()
);
root-addChild(ModelRoot.get());
...
//in frame loop
.
switch(CMD)
{
case LOAD_SCENE:
{
loadedModel = osgDB::readNodeFile(CMD_SceneFileName);
if (loadedModel.valid())
{
ModelRoot-addChild(loadedModel.get());
}
break;
}
case RELEASE_SCENE:
{
if(ModelRoot.valid())
{
ModelRoot-removeChildren(0,ModelRoot-getNumChildren());
}
loadedModel.release();
break;
}
}
...
The loadedModel is added to ModelRoot and is not added to any other group.
Models could be loaded and released. But I found used memory was not
reduced at all after RELEASE_SCENE was executed. After loading and
releasing several times, used memory is more than 1GB and program is
freezed. I want to know the reason and how to improve it.
Much appreciation to any reply.
Regards,
Su Hu
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Re: [osg-users] how to release loaded model
Hi Robert,
I set ref_ptr to null. It works well. Thanks a lot.
Best Regards,
Su Hu
2008/7/24 Robert Osfield [EMAIL PROTECTED]:
Hi Su,
You shouldn't be called ref_ptr.release() in this context, you should
be just setting the ref_ptr to null.
ref_ptr::release() is a specialist helper method with does an
unref_noDelete on the referenced object - it deliberately doesn't
delete the object that it's unrefecing. This functionality is
required for functions that use ref_ptr locally but then have to
pass a C* point of the object.
Robert.
On Thu, Jul 24, 2008 at 10:45 AM, su hu [EMAIL PROTECTED] wrote:
Hi all.
I need to release loaded model and reload other model. I did as follow:
osgViewer::ViewerViewer;
osg::ref_ptrosg::Group root = new osg::Group;
osg::ref_ptrosg::Group ModelRoot = new osg::Group;
osg::ref_ptrosg::Node loadedModel;
...
Viewer.setSceneData(root.get()
);
root-addChild(ModelRoot.get());
...
//in frame loop
.
switch(CMD)
{
case LOAD_SCENE:
{
loadedModel = osgDB::readNodeFile(CMD_SceneFileName);
if (loadedModel.valid())
{
ModelRoot-addChild(loadedModel.get());
}
break;
}
case RELEASE_SCENE:
{
if(ModelRoot.valid())
{
ModelRoot-removeChildren(0,ModelRoot-getNumChildren());
}
loadedModel.release();
break;
}
}
...
The loadedModel is added to ModelRoot and is not added to any other
group.
Models could be loaded and released. But I found used memory was not
reduced at all after RELEASE_SCENE was executed. After loading and
releasing several times, used memory is more than 1GB and program is
freezed. I want to know the reason and how to improve it.
Much appreciation to any reply.
Regards,
Su Hu
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Re: [osg-users] how to release loaded model
Hi Ümit
Thanks for you suggestion. There are several scene models in our application
and they are large. So we have to release them when we start a new scene.
Thanks again.
Kind Regards,
Su Hu
2008/7/24 Ümit Uzun [EMAIL PROTECTED]:
Hi Su,
I think you shoul use Switch node to change the model. It is so easy and
useful. Look at the simple example.
2008/7/24 su hu [EMAIL PROTECTED]:
Hi all.
I need to release loaded model and reload other model. I did as follow:
osgViewer::ViewerViewer;
osg::ref_ptrosg::Group root = new osg::Group;
osg::ref_ptrosg::Group ModelRoot = new osg::Group;
osg::ref_ptrosg::Node loadedModel;
...
Viewer.setSceneData(root.get());
root-addChild(ModelRoot.get());
...
//in frame loop
.
switch(CMD)
{
case LOAD_SCENE:
{
loadedModel = osgDB::readNodeFile(CMD_SceneFileName);
if (loadedModel.valid())
{
ModelRoot-addChild(loadedModel.get());
}
break;
}
case RELEASE_SCENE:
{
if(ModelRoot.valid())
{
ModelRoot-removeChildren(0,ModelRoot-getNumChildren());
}
loadedModel.release();
break;
}
}
...
The loadedModel is added to ModelRoot and is not added to any other
group.
Models could be loaded and released. But I found used memory was not
reduced at all after RELEASE_SCENE was executed. After loading and
releasing several times, used memory is more than 1GB and program is
freezed. I want to know the reason and how to improve it.
Much appreciation to any reply.
Regards,
Su Hu
___
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osg-users@lists.openscenegraph.org
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Re: [osg-users] how to release loaded model
Hello Robert, ref_ptr::release() is a specialist helper method with does an unref_noDelete on the referenced object - it deliberately doesn't delete the object that it's unrefecing. This functionality is required for functions that use ref_ptr locally but then have to pass a C* point of the object. I have seen this confusion before from people used to Win32 programming... In MFC (I believe), calling release() on something means you don't want to use it anymore, and you want it to release its resources (kind of like calling delete on a pointer, but it's a C API so there are no destructors, hence the release() function). So it means exactly the opposite of what it means in OSG. Kind of ironic, but perhaps that just means that people need to read the API documentation a bit before using a method in their code, because it might not do what they assume it does. J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
